Step 2 - "Equal Work"?

Determine equal work

This is pretty easy if you use job evaluation, because you will be able to compare "work rated as equivalent". In other words, you would look at jobs which have the same value in terms of job evaluation, and compare the salaries of male and female incumbents. 

However, you can only use job evaluation as a basis of your equal pay audit if your job evaluation process is analytical, objective, fair and free from bias. Check this: Job Evaluations Free from Bias by the EHRC to see if your job evaluation process is fit for purpose. Or phone me. 

If you don't use job evaluation, you can still do an equal pay audit, but the results of the audit may be limited as you may not be comparing like with like. There are other checks that you can do, eg you could use job titles or grades as the basis of comparison. However, without job evaluation there can be no assumption that jobs in the same grade are of similar or equal value. 

You do what you can when you don't have job evaluation. Most organisations that carry out equal pay audits do use an analytical form of job evaluation.